could convince
Verbo regular: convince - convinced- convinced

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could convince
you could convince
he could convince
we could convince
you could convince
they could convince 	I could be convincing
you could be convincing
he could be convincing
we could be convincing
you could be convincing
they could be convincing	I could have convinced
you could have convinced
he could have convinced
we could have convinced
you could have convinced
they could have convinced	I could have been convincing
you could have been convincing
he could have been convincing
we could have been convincing
you could have been convincing
they could have been convincing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't convince
you couldn't convince
he couldn't convince
we couldn't convince
you couldn't convince
they couldn't convince 	I couldn't be convincing
you couldn't be convincing
he couldn't be convincing
we couldn't be convincing
you couldn't be convincing
they couldn't be convincing	I couldn't have convinced
you couldn't have convinced
he couldn't have convinced
we couldn't have convinced
you couldn't have convinced
they couldn't have convinced	I couldn't have been convincing
you couldn't have been convincing
he couldn't have been convincing
we couldn't have been convincing
you couldn't have been convincing
they couldn't have been convincing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I convince?
could you convince?
could he convince?
could we convince?
could you convince?
could they convince? 	could I be convincing?
could you be convincing?
could he be convincing?
could we be convincing?
could you be convincing?
could they be convincing? 	could I have convinced?
could you have convinced?
could he have convinced?
could we have convinced?
could you have convinced?
could they have convinced? 	could I have been convincing?
could you have been convincing?
could he have been convincing?
could we have been convincing?
could you have been convincing?
could they have been convincing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I convince?
couldn't you convince?
couldn't he convince?
couldn't we convince?
couldn't you convince?
couldn't they convince? 	couldn't I be convincing?
couldn't you be convincing?
couldn't he be convincing?
couldn't we be convincing?
couldn't you be convincing?
couldn't they be convincing? 	couldn't I have convinced?
couldn't you have convinced?
couldn't he have convinced?
couldn't we have convinced?
couldn't you have convinced?
couldn't they have convinced? 	couldn't I have been convincing?
couldn't you have been convincing?
couldn't he have been convincing?
couldn't we have been convincing?
couldn't you have been convincing?
couldn't they have been convincing?